纳米尺度下的局域场增强研究进展

金属纳米颗粒的等离激元共振引起的局域场增强效应,对显微成像、光谱学、半导体器件、非线性光学等诸多领域都具有极大的应用潜力。尤其是在光学纳米材料领域,通过亚波长金属纳米颗粒与电介质的组合引起局域场增强效应,提高了纳米材料的光学性能,并促进纳米材料在光学领域的应用。本文主要综述几种常见纳米结构所产生的局域场增强效应及其应用,详细介绍并总结了金属纳米材料的不同结构参数与局域场增强的关系及局域场增强在非线性光学、光谱学、半导体器件等领域的应用。未来,随着对金属纳米材料的研究愈发深入,局域场增强的应用将更加广泛,这将对诸多领域的发展产生重要影响。

Advances in the local field enhancement at nanoscale

Local field enhancement(LFE) based on the plasmon resonance characteristics of metal nanoparticles has great potential in many fields such as microscopy, spectroscopy, semiconductor devices and nonlinear optics. Especially in the field of optical nanomaterials, local field enhancement effect can be produced by the combination of sub-wavelength metal nanoparticles and dielectrics to improve the optical properties of nanomaterials and promote the application of nanomaterials in the field of optics. In this paper, the local field enhancement effect of several common nanostructures and their applications is mainly reviewed. The relationship between different structural parameters of metal nanomaterials and the local field enhancement and the application of local field enhancement in nonlinear optics, spectroscopy, semiconductor devices are introduced and summarized. It is foreseeable that in the future, as the research on metal nanomaterials progresses, the application of localized field enhancement will be more extensive, which have a significant impact on the development of many fields.